Rotary pump or motor.



No, 719,684. PATENTED FEB. 3, 1903.

W. S. AUSTIN.

ROTARY PUMP OR MOTOR.

APPLICATION FILED DEC. 4, 1901.

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No. 719,634. PATENTED FEB. 3, 1903. W. S. AUSTIN. ROTARY PUMP OR MOTOR.

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No. 719,634. PATENTED FEB. 3, 1903.

" W. S. AUSTIN.

ROTARY PUMP 0R MOTOR.

APPLICATION FILED DEC. 4, 1901.

N0 MODEL. 1 3 SHEETS-SHEET 3.

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UNTTED STATES PATENT OFFICE.

YVALTER S. AUSTIN, OF GRAND RAPIDS, MICHIGAN.

ROTARY PUMP OR MOTOR.

SPECIFICATION forming part of Letters Patent No. 719,634, dated February3, 1903. Application filed December 4,1901. Serial No. 84,660. (Nomodal.)

To all whom, it may concern:

Be it known that I, WALTER S. AUSTIN, a citizen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and'useful Improvements in Rotary Pumps orMotors; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to improvements in rotary pumps or motors; and itsobject is to provide the same with means for varying the capacity atpleasure and to provide the device with certain new and useful featureshereinafter more fully described, and particularly pointed out in theclaims.

My device consists, essentially, in providing an adjustable side or wallin the case, whereby the total space between the hub and case may bevaried at pleasure to vary the capacity of the device, and also incertain improved arrangement and construction of parts, as hereinaftermore fully described, and particularly pointed out in the claims,reference being bad to the accompanying drawings, in which- Figure 1 isa side elevation of a device embodying my invention; Fig. 2, a plan viewof the same; Fig. 3, a vertical section of the same on the line 3 3 ofFigs. 2 and 4; Fig. 4, a horizontal section of the same on the line 4 4:of Figs. 1 and 3; Fig. 5, a transverse vertical section on the line 5 5of Fig. 3; Fig. 6, a perspective detail of a piston; Fig. 7, a sectionaldetail of the head, having the ports taken on the line 7 7 of Fig. 1;Fig. 8, the

same on the line 8 8 of Fig. 1; Fig. 9, a detail of a piston intransverse section; Fig. 10, a detail of the packings in the case, andFig. 11 a detail of the same in section on the line 11 11 of Fig. 5.

Like letters refer to like parts in all the figures.

The hub is a cylindrical body fixed on the shaft and having chambers forthe pistons. This hub is preferably composed of a middle portionconsisting of the partitions A, extending outward from the axis andhaving the surface adjacent each piston concentric with the pivot of thepiston, and segments A at the outer ends of the partitions, saidsegments forming portions of the periphery of the hub to engage the caseand prevent blowing through from side to side of the hub by engaging thepacking D when the plates 0 are not opposite said packing. Between thesesegments the pistons are projected outward by springs K and engage andtraverse the interior of the case. At each side of this middle portionand secured thereto are discous plates A, which plates constitute theends of the hub and rotate in suitable recesses in the heads G and G ofthe case. These parts are secured together by bolts extending throughthe plates A, the partitions A, and segments A. The pistons arepreferably four in number, and each piston consists of side arms B,connected at one end by a tubular portion 13, in which is inserted a pinon which the piston is pivoted, and at the other end a segmental portionB, having an outer surface concentric with the axis of said pin andfitting closely against the concave surface of the partition A. At theouter end of the portion B is a concave B. This concave is preferablymade more than one-half of a tube, whereby it tends to retain thepacking O in place therein. This packing is preferably of cast metal andhas a limited rotary movement in the concave and is provided with aconvex facingplate 0, preferably of sheet metal. This 'plate 0 haslateral projections O", engaging one side of the concave B to limit therotary movement of the packing O in one direction, and similarprojections 0 to engage the hub to limit said movement in the oppositedirection. The case has two parallel sides D D, engaging the peripheryof the hub at the middle, where they are provided with packings D D,contacting the hub at opposite sides thereof. These packings havelaterally-extended portions D, engaging suitable recesses in the case,whereby the pistons are carried smoothly over the edgesof the packing.Lune-shaped chambers are provided in the case at each side of the hub.The concave surfaces of these chambers preferably have a radius the sameas the hub and are formed in walls E E, slidably engaging the interiorof the case at the top, bottom, and sides and adjustable therein towardand from the hub, whereby the capacity of the lune-shaped chambers ateach side of the hub may be varied at pleasure. These walls have smallvents or openings E to permit the fluid to pass behind the same tobalance the pressures and permit free adjustment of the walls E. The

walls E are also provided with tubular stems E E, extending through theends of the case and slidable in stuffing-boxes E in the same. Saidwalls are adjusted and held by means of a right-and-left screw F, havingnuts F, pivoted in the forked ends of pivoted levers F E, which leversare connected to the walls by rods F F within the stems E E.

In the head G of the case and near the ends of thelune-shaped chambersare ports H, Fig. 3, for ingress and egress of fluid. The diagonallyopposite ports are connected to each other by means of annular ports I Iin the head Gand surrounding the shaft. The port I has branch ports I,connecting it to two diametrically opposite ports H, and the port I haslike ports 1', connecting it with the other two ports H. Any suitableingress and egress pipes J J are connected to the respective ports I I,as occasion requires.

The pistons are pivoted near the angles formed by the union of thepartition A and segments A and are yieldingly held outward by suitablesprings K. Packing L is also provided to make a tight joint between thepistons and partitions. Bolts M are also inserted in the packing C andextend through the slotted openings in the concaves B and are providedwith large heads slidable on the concaves. These bolts serve asauxiliary means of securing the packing in place in the concave in casethe packing Wears and becomes loose. In operation the packings Ooscillate in the concaves to closely engage the plates 0 with the wallsE. As these plates traverse the interior of the case between the walls Ethe packings O tend to turn in the concaves and engage the forward edgeof the plates 0 with the acute angle of the wall E or anyslightly-projecting angle of the packing D. To prevent this, therotation of the packing O in the concave is limited by engagement of'theprojecting portions 0 with the edge of the concave B' when the machineis running one way and the engagement of the portions 0 with the hubwhen the machine is running the other way. The axis of the packings 0being near the plates 0 tends to evenly seat the latter against thewalls,

' and the large surface in contact between the concaves and packings andwhere the pistons engage the walls prevents leakage and rapid wear. Thefluid being free to pass between the arms and into the chambers of thehub acts directly upon the part B of the pistons The pressure beingequal and at opposite sides of the shaft, all side strains on the sameare avoided.

By adjusting the walls E E toward the hub the capacity of the chambersat each side thereof can be Varied at pleasure. This adapts the deviceto various uses, some of which are as follows: As a propelling-pumphaving a uniform rotary motion and to drive another rotary device theratio of motion of the two can be varied at pleasure, thus providing ahigh pressure and slow movement of the driven. device or lower pressureand more rapid motion of the same, as occasion may require. As a motordriven by an inelastic fluid under high pressure no more fluid need beused than is required to do the work. The capacity can be cut down tothe amount required atthe time and increase with the increase of load,as occasion requires. It can thus be used to great advantage intransmitting power from a gasolene-engine running at constant speed tothe driving-axle of an automobile or as a hydraulic motor for elevators,using no more water than necessary to do the work. Various other'usesare obvious to one skilled in the art to which the device belongs.

I do not limit myself tothe exact construction shown, as variousmodifications of the same may be adopted without departing from thespirit of my invention.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is'

1. The combination of a rotary hub, pistons movably attached to the hub,a case inclosing the hub and pistons, and an adjustable wall in thecase, at one side of the hub, and having a concave surface of the sameradius as the hub, substantially as described.

2. The combination of a case, a rotary hub, pistons movably attached tothe hub, an adjustable wall in the case at one side of the hub andhaving a concave side adjacent to the hub and of the same radius as thehub, and means for adjusting the wall, substantially as described.

' 3. The combination of a case, a rotary hub having chambers,reciprocating pistons in the hub and projecting outward therefrom,separate movable walls at opposite sides of the hub and having concavesides adjacent to the hub and of the same radius as the hub, and

means for adjusting the walls toward and her at one side of the hub, anadjustable wall in the chamber, and means for adjusting the wall,whereby the total space between the wall and hub may be varied byadjusting the wall, substantially as set forth.

6. The combination of a case having parallel sides engaging theperiphery of the hub at opposite sides only, a hub rotative in the case,an adjust-able wall in the case having a concave side of the same radiusas the hub,.

an outwardly-movable piston in the hub, a concave on the piston, apacking rotative in the concave, and projections on the said packing toengage the concave and hub and limit the rotation of the packing in theconcave, substantially as described.

7. The combination of a hub, a case engaging the periphery of the hub atopposite sides thereof, adjustable concave walls in the case at eachside of the hub and having the same radius as the hub, means foradjusting the said walls, outwardly-movable pistons in the hub andpacking on the pistons contacting the concave surfaces of the walls,substantially as specified.

8. The combination of a rotary hub, a case having parallel sidescontacting the periphcry of the hub at opposite sides, concave walls ateach side of the hub and slidably engaging the case at the top, bottom,and sides, and having concave sides adjacent to the hub and of the sameradius as the hub, outwardly-movable pistons in the hub contacting andtraversing the concave sides of the walls, and means for adjusting thewalls, substantially as described.

9. The combination of a case, a rotary hub in the case,outwardly-movable pistons in the hub, a movable wall in the case andhaving a concave side adjacent to the hub, a stem on the said wall andextending through the case, a screw, a nut on the screw, and a pivotedlever connected to the nut at one end, and to the wall at the other end,substantially as described.

10. The combination of a rotary hub, outwardly-movable pistons in thehub, a case having parallel sides contacting the periphery of the hub atopposite sides thereof, movable walls at each side of the hub andslidably engaging the interior of the case, said walls having concavesides adjacent to the hub, stems on the walls and extending throughstuffing-boxes in the case, a rightaud-left screw journaled on the case,nuts on the screw, pivoted levers pivotally connected to the nuts at oneend, and rods connecting the other ends of the levers to the movablewalls, substantially as described.

11. The combination of a rotary hub, a case inclosing the hub and havinglune-shaped chambers at each side of the hub, outwardlymovable pistonsin the hub and traversing the interior of the case, adjustable walls inthe case to vary .the size of said chambers, means for adjusting thesaid walls consisting of, a right-aud-left screw, nuts on the screw,pivoted levers pivotally connected to the nuts at one end, andconnecting-rods attached to the other end of the levers and to themovable walls, substantially as described.

12. The combination of a rotary hub, an outwardly-movable piston in thehub, a concave on the piston having a transverse slot, an oscillatingpacking in said concave, and a bolt in the packing and extending throughthe slot, and movable therein, substantially as described. I

13. The combination of a rotary hub, outwardly-movable pistons in thehub, a case engaging the periphery of the hub at opposite sides thereof,an adjustable wall in the case, having a concave side of the same radiusas the hub, a passage to permit fluid to pass behind the wall, and meansfor adj usting the wall, substantially as described.

14. The combination of a hub, outwardlymovable pistons in the hub, acase engaging the periphery of the hub at opposite sides thereof, amovable Wall in the case and having a concave side of the same radius asthe hub, an opening in the wall to permit the passage of a fluid behindthe wall, a stem on the wall and extending outside the case, packingsurrounding the stem, and means for adjusting the wall attached to thestem, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER S. AUSTIN.

Witnesses:

PALMER A. J ONES, LUTHER V. MOULTON.

